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Big Bear Lake September Weather

Averages and records for weather in Big Bear Lake, California in the month of September.

Typical Big Bear Lake September Weather 1991–2020
Average daily high	74.5 °F
Average daily low	43.3 °F
Average monthly precipitation	0.4 inches
Average monthly snow	none
Daily chance of precipitation	6.8%
Daily chance of snow	0%

Big Bear Lake September Weather Records 1914–2024
Highest temperature	90 °F	September 1, 1950
Lowest temperature	19 °F	September 2, 1964
Highest daily low	64 °F	September 4, 2017
Lowest daily high	43 °F	September 23, 1934
Hottest average high temperature	78.2 °F	2010
Coldest average high temperature	61.7 °F	1921
Most daily precipitation	3.0 inches	September 26, 1939
Most monthly precipitation	7.7 inches	1939
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	77.8	46.9	90	30
September 2	77.6	46.7	89	19
September 3	77.5	46.5	89	26
September 4	77.3	46.2	88	28
September 5	77.1	46.0	87	28
September 6	76.9	45.7	89	29
September 7	76.7	45.5	87	28
September 8	76.4	45.2	88	24
September 9	76.1	44.9	85	24
September 10	75.9	44.5	84	27
September 11	75.7	44.3	87	23
September 12	75.4	44.0	86	26
September 13	75.2	43.8	86	26
September 14	74.9	43.6	85	28
September 15	74.7	43.3	85	30
September 16	74.4	43.0	85	29
September 17	74.2	42.7	84	30
September 18	74.0	42.4	82	23
September 19	73.7	42.2	83	24
September 20	73.4	41.8	84	24
September 21	73.0	41.4	83	24
September 22	72.6	40.9	83	26
September 23	72.2	40.5	83	25
September 24	72.0	40.2	84	21
September 25	71.8	39.9	82	23
September 26	71.5	39.6	84	22
September 27	71.1	39.3	84	26
September 28	70.8	38.9	82	24
September 29	70.5	38.7	81	20
September 30	70.4	38.4	80	21

Weather Station Details

Years	Station	Coordinates
1960–2024	Big Bear Lake	location
1914–1960	Big Bear Lake Dam	location